Thermal insulating structure

Claim 1

A THERMAL INSULATING STRUCTURE COMPRISING GAS-TIGHT WALLS ENCLOSING AN EVACUABLE SPACE; MULTIPLE LAYERS OF HEAT INSULATIVE AND RADIATION-IMPERVIOUS COMPOSITE FLEXIBLE INSULATING MATERIAL WITHIN SAID SPACE COMPRISING A LOW HEAT CONDUCTIVE MATERIAL COMPONENT AND A RADIANT HEAT BARRIER MATERIAL COMPONENT ASSEMBLED SUFFICIENTLY CLOSELY TO PROVIDE AT LEAST 4 LAYERS PER INCH OF COMPOSITE INSULATION, AND DISPOSED GENERALLY PERPENDICULAR TO THE DIRECTION OF HEAT TRANSFER ACROSS THE INSULATION SPACE; A MULTIPLICITY OF SUBSTANTIALLY INCOMPRESSIBLE TENSION BAND MEANS EACH HAVING A WIDTH GREATER THAN ITS THICKNESS AND DISPOSED IN CONTIGUOUS ADJACENCY WITH AND BETWEEN AT LEAST SOME OF SAID COMPOSITE FLEXIBLE INSULATING MATERIAL LAYERS AND ALIGNED IN STACKS ACROSS SAID INSULATION SPACE WITH INDIVIDUAL STACKS SPACED FROM EACH OTHER AND UNDER SUFFICIENT TIGHTNESS AGAINST THE INSULATING MATERIAL TO CONCENTRATE THE TOTAL FRICTIONAL FORCE BETWEEN THE COMPOSITE LAYERS IN A MINOR PART OF THE TOTAL INSULATED AREA BENEATH SUCH TENSION BAND MEANS WHEREBY SAID MINOR PART IS COMPRESSED ABOVE ITS STABLE DENSITY AND THE REMAINING MAJOR PART OF SUCH AREA IS RELATIVELY UNCOMPRESSED AND BELOW ITS STABLE DENSITY.